System for reducing lead-in time in a laser disk reproducing apparatus

Abstract

A lead-in time reduction system determines if a disk is loaded at the time of turning on an initial focus-on function in a laser disk reproducing apparatus. If it is determined that the disk has been loaded, a pick-up is moved directly to a limit switch-on point using a feed motor only. The lead-in time reduction system includes determining if the disk is loaded by checking whether data is picked-up through the pick-up after the pick-up is located on a focus on point, if it is determined that the disk is loaded in the determining step, controlling the feed motor to move the pick-up directly to a limit switch-on point of the laser disk, and if the limit switch is turned on in the controlling step, reproducing a desired program by using picked-up information after picking up a lead-in region of the laser disk. Thus, the lead-in time which is completed before searching the location of the substantial program to be reproduced after the power is turned on, can be reduced as compared with the conventional technology.

What is claimed is: 
     
       1. A method for reducing a lead-in time in a laser disk reproducing apparatus having a pick-up, a feed motor for controlling movement of the pick-up and a spindle motor for rotating a laser disk, said method comprising the steps of: determining if said disk is loaded in the apparatus based on a focus-on point of said laser disk; and   controlling said feed motor to move said pick-up directly to a limit switch-on point of said laser disk which is different front said focus-on point, if it is determined that said disk is loaded in said determining step where in the apparatus further has a limit switch disposed at the limit switch-on point and said limit switch is turned on when said pick-up is disposed at the limit switch-on point; and   reproducing a desired program by using picked-up information after picking up information in a lead-in region of said laser disk, if said limit switch is turned on in said controlling step.   
     
     
       2. The method for reducing a lead-in time according to claim 1, wherein said controlling step is performed such that said pick-up does not perform operational controls of said spindle motor and track jump operations, but is moved by controlling said feed motor only. 
     
     
       3. The method for reducing a lead-in time according to claim 1, wherein said determining step includes checking whether data is picked-up through said pick-up after the pick-up is located at a focus on point. 
     
     
       4. The method for reducing a lead-in time according to 1, further comprising the step of: driving said spindle motor to rotate said disk after said pick-up is moved to said limit switch-on point.   
     
     
       5. A laser disk reproducing apparatus, comprising: a pick-up;   a feed motor for controlling movement of said pick-up;   a spindle motor for rotating a laser disk;   means for determining if the disk is loaded in the apparatus based on a focus-on point of said laser disk; and   means for controlling said feed motor to move said pick-up directly to a limit switch-on point of the disk different from said focus-on point, if it is determined that the disk is loaded, wherein the apparatus further has a limit switch disposed at the limit switch-on point and said limit switch is turned on when said pick-up is disposed at the limit switch-on point, and reproducing a desired program by using pickup information after picking up information in a lead-in region of said laser disk, if said limit switch is turned on.   
     
     
       6. The laser disk reproducing apparatus according to 5, wherein said means for controlling said feed motor moves said pick-up directly to said limit switch-on point of the disk without performing a tracking control operation. 
     
     
       7. The laser disk reproducing apparatus according to 5, wherein said means for controlling said feed motor moves said pick-up directly to said limit switch-on point of the disk by controlling said feed motor only. 
     
     
       8. The laser disk reproducing apparatus according to 5, further comprising: means for controlling said spindle motor to rotate said laser disk after said pick-up is moved to said limit switch-on point.